These are a nice selection of cabochons from the Royal Blue mine in Royston NV. The Royal Blue is known for it's sky blue colour which rivals Sleeping Beauty for it's clarity. Most of these cabs show mixed  matrix. They are shown on 1 cm graph paper and the total weigh is 215 ct. None are backed, some might have small imperfections in them and may require more polishing as they are not stabilized.

The Royal Blue mine, in the Royston mining district of central Nevada, was discovered in 1902.  It has been worked intermittently since that time.  The greatest production occurred between 1910 and 1940 when it was the major producer of turquoise in the United States.  This mine has produced more gem grade clear blue turquoise than any other mine in Nevada.  The turquoise ranges in color from dark sky blue to a pale light blue.  Some of the dark blue has a slight greenish cast and some has a nearly pure blue color.  When matrixed, the veins have a stain of dark brown to yellow limonite.  Rarely, stones from this mine have a beautiful combination of dark and light blue color with a red brown matrix.  In recent years, Royal Blue turquoise has rarely been found.  Only a few pounds have been mined. If you were to find any for sale, the asking price is $4.00 ct. I am asking less than that.

Please remember that monitors can differ in colour tones. All measurements are as accurate as possible on un-certified equipment. We will not be held responsible for slight variations in weight, size, carets etc.